ESE's works engine tuner

[TZ350]

Attachment 343593
Trying to shake that transponder to pieces?

and up side down

So it is, good spotting ...... our bad, again.

Yes, I was surprised that the Two stroke measured louder on the sound meter than some four strokes but sounded much quieter than all of them.

[jasonu]

Attachment 343588
The only two stroke in the race.
]

That's fucking sad!!!

[speedpro]

I kind of agree but there are a couple of very cool 4-strokes that nearly make up for it.

[F5 Dave]

It's the sad fact of so little base stock to build bikes from
. The MB100 in your Avatar is from 1978. That's 41 years old.

But I still have some crankcases just in case.

[jbiplane]

In the Ryger the pumping volume reduction is 58cc, 50%.
As in this other engine
https://www.youtube.com/watch?v=TB9PGPnSEtA

I use a bit other design. 50hp classical piston engine clone of 503cc Rotax was modified. I got 64hp at 6700 rpm without any additional modifications. 72 bore 61 stroke.

[Flettner]

this is running?
Significant

[ceci]

I use a bit other design. 50hp classical piston engine clone of 503cc Rotax was modified. I got 64hp at 6700 rpm without any additional modifications. 72 bore 61 stroke.

Congratulations on your success
It is evident that in his design, the loss of pumping volume is less.
The increase in power, what mystery is it due to?

[wobbly]

Praise the Lord - we have someone posting on here something of significance in two stroke performance advancement.
Congratulations JB on the effort , and as the quoted improvement is totally believable I feel no need whatsoever to ask to see the dyno printout.
Now , if like some other Sin Binned member , JB had posted only an outside view and said it made 100Hp at 20,000 rpm some on here might end up getting nasty
after 2 years of asking , and waiting , and waiting.
Hell no, not me.

[Flettner]

I wonder, is piston friction that significant, in a normal engine? 14 HP worth.
Ill bet the bugger vibrated somewhat��.

[speedpro]

Quite possibly piston friction is significant given the documented evidence of increased horsepower when oil is added to the mixture

[jbiplane]

this is running?
Significant

Runned previous version. Had to remake on CNC with better precision. Finally want to rework again for longevility. Have clear vision how. My current dyno is limited to 35 hp, so I use propeller (moulinette) to estimate power and got only one HP point, not complete graph. Dont sure if stock muffler is optinal for this engine. This experimental engine made for customer who will going to order me 2-stroke star for amateur aircraft use.

For vibration. the masses connected to connecting rod together add 37 grammes compare piston. May be in next design I'll be able decrease this difference.

Congratulations on your success
It is evident that in his design, the loss of pumping volume is less.
The increase in power, what mystery is it due to?

Frankly speaking I observe power increase in natural test but cannot clearly understand reasons.

[TZ350]

In the Ryger the pumping volume reduction is 58cc, 50%.
As in this other engine



https://www.youtube.com/watch?v=TB9PGPnSEtA

I use a bit other design. 50hp classical piston engine clone of 503cc Rotax was modified. I got 64hp at 6700 rpm without any additional modifications. 72 bore 61 stroke.

Great to see these experimental engines.

[husaberg]

In the Ryger the pumping volume reduction is 58cc, 50%.
As in this other engine

https://www.youtube.com/watch?v=TB9PGPnSEtA

Pretty sure that is actually Katinas engine.............

[ceci]

Praise the Lord - we have someone posting on here something of significance in two stroke performance advancement.
Congratulations JB on the effort , and as the quoted improvement is totally believable I feel no need whatsoever to ask to see the dyno printout.

bore 72 stroke 60, the powers are from 25CV of gasgas pampera to 37CV of bultaco pursang (without exhaust valve and classic distribution). Your data is within this logic

[jbiplane]

bore 72 stroke 60, the powers are from 25CV of gasgas pampera to 37CV of bultaco pursang (without exhaust valve and classic distribution). Your data is within this logic

All experimental engines which I made were preordered by customers.
Now customer happy with initial results and will continue experiments by himself using my "creuzcopf kits" = piston + rod + spacer.
I will modify this kits making it cheaper and more reliable in each iteration. One day I hope to make more radical design.

Here gas forces from one cylinder compensated by opposite one. This engine can be statically balanced to 0.